From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Instruction to modify the 40/50 Bumper Chassis with different spare wheel bracket supports due to bolt failures.
| Identifier | ExFiles\Box 119\2\ scan0369 | |
| Date | 13th February 1933 | |
| XH268 RHC.{R. H. Coverley - Production Engineer} from Hs{Lord Ernest Hives - Chair}/Les.{Ivan A. Leslie} Hs{Lord Ernest Hives - Chair}/Les.2/KT.13.2.33. 40/50 BUMPER CHASSIS. Whilst you are carrying out modifications to the above chassis, will you please fit the production side spare wheel bracket supports issued under BY/HEB{H. Biraben}2/M11.4.32, and BY/HEB{H. Biraben}8/M12.7.32. We have experienced two failures of the .375" diameter bolts with 19-EX in France, and should like to carry out further tests. You will be able to get all the necessary parts from production. Hs{Lord Ernest Hives - Chair}/Les.{Ivan A. Leslie} | ||